We know the Galaxy is faster, from "Tin Man". Obviously, Romulans wouldn't volunteer the specs of the design, but by the time of the episode, Starfleet must have accommodated enough intel to justify this assessment, and indeed the episode supports it in the sense that a D'deridex is badly damaged by forcing a speed higher than that of the E-D, and another warbird that doesn't want to be damaged is forced to travel slower than the E-D.

We know the D'deridex was intended to be larger, and was occasionally photographed as being larger, but this isn't all that clear-cut. We have seen ship vs. ship photography in conflict with size estimates obtained from other and more objective visual comparisons (doorway sizes or whatnot). Usually, such conflict is associated with comparisons of Starfleet ships vs. cloaking-capable enemy ships; perhaps cloaks have a tendency to alter the apparent size of a ship even when idled?

We know little about firepower, as any situation where a single warbird actually destroys a Federation target or is briefly feared of being capable of this is a "pants-down" one, and any situation where Picard objectively believes he absolutely cannot win the fight even with a fully prepared Enterprise involves more than one warbird...

Umm, what? Clearly, the volume of the warbird is much greater than that of the Galaxy if we accept the external dimensions shown above.

Eyeballing from the pictures, a single Romulan nacelle is already worth three Federation ones (and let's remember that the makers of the DS9 Tech Manual from which these figures come assume that some 25% of a starship's mass is in her warp coils.). The saucer is but a fraction of the size of either the upper or the lower wing. And then comes the beak section of the Romulan ship...

The D'deridex might be a tad less massive/voluminous than the Galaxy if both were of equal length, yes. But it would be a close call even in that case.

If we take this Tech Manual set of figures, we probably have to assume that the analyst let a digit out of the Romulan mass figures... 14,300,000 metric tons is closer to what the volume ratio suggests!

Umm, what? Clearly, the volume of the warbird is much greater than that of the Galaxy if we accept the external dimensions shown above.

Eyeballing from the pictures, a single Romulan nacelle is already worth three Federation ones (and let's remember that the makers of the DS9 Tech Manual from which these figures come assume that some 25% of a starship's mass is in her warp coils.). The saucer is but a fraction of the size of either the upper or the lower wing. And then comes the beak section of the Romulan ship...

The D'deridex might be a tad less massive/voluminous than the Galaxy if both were of equal length, yes. But it would be a close call even in that case.

If we take this Tech Manual set of figures, we probably have to assume that the analyst let a digit out of the Romulan mass figures... 14,300,000 metric tons is closer to what the volume ratio suggests!

Timo Saloniemi

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The mass of the Warbird would never be 14,300,000 metric tons. It is about 4,300,000 metric tons because the Warbird has a lot of empty space inside it that is never used. They didn't know what to do with all the extra space. So it actually looks a lot bigger than it actually is. The Romulans ended up creating a ship that has a bigger bark than a bite.

The mass of the Warbird would never be 14,300,000 metric tons. It is about 4,300,000 metric tons because the Warbird has a lot of empty space inside it that is never used. They didn't know what to do with all the extra space. So it actually looks a lot bigger than it actually is. The Romulans ended up creating a ship that has a bigger bark than a bite.

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If I remember my TNG Technical Manual correctly, the Galaxy-class also has a large amount of unused internal volume.

Maybe if I click my heels together three times and chant "there's no designer like Sternbach", Rick Sternbach will come in and offer some insight.

Though I'm pretty sure from a combat standpoint, the intent was that the two classes were roughly equal.

As the Enterprise left the Utopia Planitia Fleet Yards, approximately 35% of the internal volume was not yet filled with room modules and remained as empty spaceframe for future expansion and mission-specific applications.

Just the coarse side view will reveal the massive warp nacelles, the humungous "head hull", and the sheer chord of those wings. The ship in the smaller of the two alternative views above is necessarily at least three times as heavy as the Galaxy, assuming somewhat similar materials and construction techniques, and quite possibly ten million tons heavier.

The Galaxy is a flat and flimsy thing that is mostly empty volume - draw a box around it and there's lots of "wasted" volume between the nacelles and underneath the saucer. Draw a box around the Romulan ship and the amount of "wasted" volume is at most the same, and probably a bit less.

Size matters not, though. The Kazon had ships even larger than Romulan Warbirds, and Voyager could handle them one on one, easily.

The sense I always got was that the Warbirds' technology were overall inferior to the Federation's, especially with Galaxy class and newer, and the only thing that might give the Romulans the edge is cloaking technology.

The Romulans must fear the Federation's strength for some reason though, otherwise they wouldn't demand by treaty that the Federation not be allowed to have a cloaking device.

Size matters not, though. The Kazon had ships even larger than Romulan Warbirds, and Voyager could handle them one on one, easily.

The sense I always got was that the Warbirds' technology were overall inferior to the Federation's, especially with Galaxy class and newer, and the only thing that might give the Romulans the edge is cloaking technology.

The Romulans must fear the Federation's strength for some reason though, otherwise they wouldn't demand by treaty that the Federation not be allowed to have a cloaking device.

Just the coarse side view will reveal the massive warp nacelles, the humungous "head hull", and the sheer chord of those wings. The ship in the smaller of the two alternative views above is necessarily at least three times as heavy as the Galaxy, assuming somewhat similar materials and construction techniques, and quite possibly ten million tons heavier.

The Galaxy is a flat and flimsy thing that is mostly empty volume - draw a box around it and there's lots of "wasted" volume between the nacelles and underneath the saucer. Draw a box around the Romulan ship and the amount of "wasted" volume is at most the same, and probably a bit less.

Timo Saloniemi

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So where is your proof that it is bigger in mass? I don't see any information anywhere that says the D'deridex has a greater mass than the Galaxy class. It's just the opposite of that actually. And for being a "flat and flimsy thing", the Galaxy class starships seem to hold up just as well or better than the Romulan warbird.

So where is your proof that it is bigger in mass? I don't see any information anywhere that says the D'deridex has a greater mass than the Galaxy class. It's just the opposite of that actually.

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So you have proof that the Galaxy has greater mass? Even though 35% of it is empty?

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Yes, most sources say that the Galaxy class's mass is 4.5 million metric tons. They also say the Romulan warbird's mass is 4.3 million metric tons. No source says the Romulan warbird has greater mass than the Galaxy class. Therefore, there is no proof that the Romulan warbird has greater mass than the Galaxy class.

Yes, most sources say that the Galaxy class's mass is 4.5 million metric tons. They also say the Romulan warbird's mass is 4.3 million metric tons. No source says the Romulan warbird has greater mass than the Galaxy class. Therefore, there is no proof that the Romulan warbird has greater mass than the Galaxy class.

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Unless those sources include someone that actually worked on the show, I'd say they don't really count.